 /*******************************************************************************
  * Copyright (c) 2006 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  * IBM Corporation - initial API and implementation
  ******************************************************************************/

 package org.eclipse.ui.internal;

 import org.eclipse.jface.viewers.IStructuredSelection;

 /**
  * <p>
  * A service that is capable of converting a selection into resources.
  * </p>
  * <p>
  * This interface is only intended for use within the
  * <code>org.eclipse.ui.workbench</code> and <code>org.eclipse.ui.ide</code>
  * plug-ins.
  * </p>
  *
  * @since 3.2
  */
 public interface ISelectionConversionService {

     /**
      * Attempt to convert the elements in the passed selection into resources by
      * asking each for its IResource property (iff it isn't already a resource).
      * If all elements in the initial selection can be converted to resources
      * then answer a new selection containing these resources; otherwise answer
      * an empty selection.
      *
      * @param originalSelection
      * the original selection; must not be <code>null</code>.
      * @return the converted selection or an empty selection; never
      * <code>null</code>.
      */
     public IStructuredSelection convertToResources(
             IStructuredSelection originalSelection);

 }

